Mold for casting types



N. MONOBE MOLD FOR CASTING TYPES Filed Feb. 7, 1925 3 Sheets-Sheet 1 N. MONOBE plow FOR CASTING TYPES April 13 3 Sheets-Shoot 2 Filed Feb. 27, 1925 April 13,1921 1,580,521

N. MONOBE MOLD FOR CASTING TYPES i d F 27. 1925 3 Sheets-Sheet 5 unrrso STATES-PATENT OFFICE.

NOBUTARO MONOBE, or TOKYO, JAPAN, ASSIGNOR 'romzo .HAYASHI, or TOKYO, JAPAN. I

FatentedApr. 13,1926. 7 1,530,521

- MOLD non oasrme TYPES.

Application fl led February 27, 1925. Serial No. 12,115.

To ail whom it may concern: mold (1) and the other side, by the lower Be it known that LNonU'rARo MONOBE, a mold (3), the end to be closed by a matrix subject of the Emperor of Japan, residing at (6) shown in Fig. 2. If the lower mold No. 12, Q-C-home, lchibeye-cho, Azabu-ku, slides to the right in Fig. 3, the bottom of Tokyo, Japan, have invented new and uses the cavity will be opened. The upper mold W ful Improvements in a Mold for Casting is provided with a groove (8) on the bottom Types, of which the following is a Specifisurface across the above. mentioned cavity,

cation. 7 i which groove fitting a projection or ridge- This invention relates to a mold for cast- (7) of the lower mold. The port makes 1 ing types consisting of a mold proper divisa step with the end of the cavity (4), and G ibl-e into two, one part of which contains is formed by inclined planes. It is thus difiithree sides of a casting cavity and the other cult to make them integral with the mold. part forms the fourth side,so arranged that It is therefore preferably made in a piece the latter closes or opens the cavity by slid- (9) as shown in Fig. which is to be fixed V 1 ing, the former being provided with rods with screws to the sideof the main body of 70 at the opposite side of the sliding member, the upper mold (1). A rectangular proand when a type is cast and the cavity is jection (10) is provided at the central poropened, the rods pushing the cast type out tion of the bottom surface of the upper mold of the cavity, and ducts within the body of 'Inside the upper mold a circularv chanthe mold proper connected with water pipes n'el (11), both ends of which are closed, is 7 to circulate cooling water, and theobject of bored near the cavity 1), and two ducts this invention is to provide a mold for 'cast- (12) and (13) perpendicular to and coming types rapidly of a hard metal of a high municating with thechannel (11), are promelting point in accurate size and shape. vided- (14) and (15) are water pipes which The accompanying drawings show anexare connected respectively to the ducts (12) ample of a type-casting machine constructed and (13), and cooling water is circulated according to this invention, Figure 1 shows through them. The upper wall of the cavity an elevation of the machine with sime. part (4) is provided with vertical holes for rods broken away; Fig. 2 the side view with some (16) which are at such position that their part shown in section; Fig. 3 is a front view lower ends are in the same plane with the S5 of the mold; Fig. 4 a side elevation; Fig. upper surface of the cavity (4:) during the 5 a horizontal section on the line V-V in injection of molten metal; but after the in- Fig. 3; Fig. 6' a front view of the main jection thev rods moving downwards, push body of the upper mold;.Figs. 7 and 8 are the cast type out of the mold. As shown in vertical sections respectively on the lines Fig. 9 the bottom mold (3) has thickness VII- ill and VIT1-VIII in Fig. 6; Fig. slightly greater than the width of type and 9 is a perspective view of a sliding-plate or is provided with a rectangular hole (17), the

the lower mold; Fig. 10 a perspective view width of which corresponds to that of proof a piece which is attached to, and forms jection (10). at the bottom of the upper part, of the upper mold; Fig. 11 a front view mold and the length is longer than that of of the mold bed; Fig. 12' a vertical section the latter. The uppersurface of the lower on the line XIL-XII of Fig. 11; Fig. 13 moldis provided on one side with a ridge a front view of a modified construction of (7) which fits the groove (8) on the lower the upper mold; and Fig. 1 1 a section of the surface of the upper mold and on the other same.

p v side there is a pro ect1on (18) which comes In the Figs. 3 and 4t, (1) is the upper mold, in contact with the bottom of the piece (:2) the mold bed, (3) the lower mold which attached to the. upper mold and forms the slides between the upper mold (1) and the bottom of the port (5), the lower surface mold bed (2), (4) a cavity forcastingl being simply a plane. The upper surface of 50 formedbetween the upper and the lower the mold bed (2)'i s provided with a shallow molds. The molten alloy is to be injected indentation (19) in which the bottom of the into the cavity (4) through a port (5) .proprojection (10) of the upper'moldis seated, vided at one end of the mold, thus types and holes (20) for screws which fix the being cast. The three sides of theaboveupper mold atits position. The downwardrnentioned' cavity are formed in theppper 1y extending portion (21) ofjthebed is used .110

for it to the machine frame. The bed has water passages (22), (23), and in the interior similarly situated as the passao'cs (ll), (12), and (13') in the upper-mold are connected with the water pipes and (2(3).

In Figs. 13 and 1 t a machine is shown in which the upper mold of the main body is made divisible 3 ito two parts (1) and (1). The part (1) is a flat plate equal in thickness to the height of types to be cast, inserted between the part (1) and the lower mold and has a projection (l6) at the other end, which is inserted between two projections (-l'?) and of the part (1), being; moved by adjusting screws (4:9) and (50) so as to adjust the width of the cavity and consequently that of types to be cast.

The mold is completed by fixing its variousparts as described in their places. The piece is fixed at one side of the upper mold (1), the bottom project-ion thereofbeinginserted in the indentation (19) of the mold bed (2) and secured with screws, and the projection (10) penetrating into the lower mold (3) through the rectangular hole (17). Thus the lower mold (3) which lies between (1) and (2) can slide from left to right. and vice versa. If the lower mold. as shown in Fig. 3 slides to the right, it opens the bot-tom of the cavity (-l), and by the downward motion of the rods (15) the cast type is pushed down and drops on the bed (2) ...and then delivered out of the mold in its return motion to the left.

Fi s. 1 and 2 show an exampleof my type casting; machine equipped with the mold tie s-ribed before, in which (27) is an alloy melting. pot, (28) a tapping hole, (29) a needle valve which controls the supply of melted metal, (30) a piston which forces out the melted metal, (31) a mold holding; frame hinged to the main frame with the pin (33) a matrix holdinp frame hinged to the former with the pin (34-), and a cam shaft. The above mentioned mold is clamped to the mold. holding frame (31) with screws at the downwardly extending portion (21) and the matrix (6) is fixed to the holder (33). Several cams are fixed to the cam shaft (35) (though not showi'r in the figures)" and revolution of these; cams forces the matrix (1(3) to come in contact, withthe end of the mold (4.) and the mold with the tapping hole (23). Next the needle valve (29) .3 baclrand opens the, tapping hole by the, action of another cam and lever, and the piston forcesthe-molteu metal into the mold through the tapping hole. Then the-mold;holding:- frameand the matrix holdor. returning; to their former position by the action-ofthe cams andspringc, areseparated from 1e; tapping hole and-kept. apart, A; grom ed cam (36) is tired to the cam. shaft together with. previously described cams, and a roller (39) at the lower end of a lever (38) is pivoted to the mold holding frame. with apin. (37) and is fitted to the groove. The upper end of the lever (33) has another roller and a connecting rod (al connects the lower mold (3) to the lever is a bracket fixed above the upper mold (1) and supports a lever L3), one end of which is connected to the push rods (16). The other end of the lever 23) is enlarged and provided with a slot (std) to which the above mentioned roller (40) is fitted, and the middle portion of which has inclination asshown at- When the frames (31) and (33) are forced to be in contact with the tapping hole (23), and themolten metal is injected as previously described, the lever (38) is at such a posi-- tion as shown in Figure 1. The shape of the groove of the cam should be determined in such a way that soon after the completion of tapping and of the return motion of the framesto the position shown in Fig. 2, the bent portion of the groove goes into action on the roller (39) of the lever (38), and the upper end of the latter swings to the right in Fig. 1 and immediately returns back to the original position. Therefore the lower mold (3) closes the bottom surface of'the upper mold and the rods 16) are at such positions as the lower, ends are in the same plane with the upper surface of the cavity l) when the frames (31) and (33) are forced to contacv with the tapping hole and the molten metal is injected into the mold (4-) by the piston. After the frames (31) and (33) return to the positions shown in Fig. 2 the motion of the lever (38) actuated by the cam (36) will move the lower mold (3) to the right through the connecting. linlr (41) and open the bottom of the mold. The roller (40) gives no influence on the lever (43), simply moving in the slot (-l-il) until thelever (33) takes this position. But as soon as the lower mold opens the bottom of the upper mold. the rollor (40) reaches to the inclined portion (45) of the said slot (M) and pushes it. Thus the other end of the lever. (43) moves downward and projects the rods (16') into the mold; Consequently the cast ty peis dropped on the upper surface of the mold. bed (2). Theniu the return motion the le ver (33), the rods ascend and the lower mold removes the type from the mold bed by its own sliding motion to the left The type: is next worked by the other finishing mechanism, i. e. the cutting away of spruc and is then completed. lVhile the casting is i no; on, the coolin'g watcr is circulatcdhy the. action of. the pump attached to the machine. through the upper. mold passage consisting of the vi .e 14 the holes (12.);

i l. P c

(11),.and (13). andithe pipe. andltlre lower mold bed passage consisting of" the the holes (23), (22), and (24),

pipe (25),

in order to cool the mold and the pipe (26), perfectly.

As hereinbefore described, the -mold according to this invention consists of two parts, (1) and As the groove which shapes the three sides of the type is provided in the part (1) and the other one side is formed by the part (3), and the latter opens the said groove by sliding parallel to the bottom surface of the part (1), the joint of the molds always closes accurately, and the type is not only made in accurate molten metal does not leak out of the joint and makes no projection on the'corner. so that no finishing is needed on the side surfaces of the type. As previously described, the cast types are not dropped from the mold bed but forced'to'slip out, so they can be brought in regular series along the guide plate connected to the upper surface of the mold bed to the finishing apparatus to cut sprue if such apparatus is attached.

Also the molds hitherto in use have no room for a perfect cooling apparatus so that the casting is very difficult unless the melting point of the alloys used is low. But in the mold according to this invention, the upper mold and its bed are equipped with water passages through which cooling Water circulates so that the mold can be perfectly cooled. Therefore the casting of the hard metal types using the alloys of high melting point which have hitherto never been used, becomes possible.

In this specification, the words upper mold lower mold etc. are conveniently used according to the positions shown in the illustrations as an example, but the relations of position are not important and the two parts of the mold are not necessarily required to be placed up and below.

Claims:

1. A mold for casting printing types con sisting of two mold members, one of which having three sides of a casting'cavity, the other being a plain plate which forms the fourth side of the same cavity, means to move the latter along the former, thus open the above mentioned cavity to permit ing the cast type to move out of the mold.

2. A mold for casting printing type consisting of two mold members, one of which having three sides of a casting cavity, the other, being a plain plate slidably inserted between the said member and a mold bed to which the former member is fixed, and after the sliding member opens the bottom of the mold as the result of its sliding form and size,,but also the v away, the cast type is pushed out of the mold andlaid on the mold bed, and then lcjlelivered from the bed by the sliding mem- 3. A mold for casting printing types consisting of an upper mold member which have the three sides of a casting cavity, one of which being adjustable by screws; 2. slidable lower mold member which forms the fourth side of a casting cavity, means to move the latter along the former, thus opening the casting cavity and delivering the cast type out of the mold; and cooling water passages.

4. A mold for casting printing types consisting of two mold members, one'of which have three sides of a casting cavity, the

other being a plain plate which forms the fourth side of the said cavity; means to move the latter along the former, thus opening the above mentioned cavity and rods to push out the cast type, the said sliding member thus delivering the cast type out of the mold, and cooling water passages, the sliding mold member being connected to a lever and the pushing rods to another lever the other end of which having a curved groove to which a projection of the other lever is inserted.

5. A mold for casting type including a first mold section provided at its bottom with a cavity, a plate closing the mouth of said cavity, means for moving one of the sections relatively to the other to open the mouth of the cavity, means for forcing a cast type out of the cavity when its month has been opened, the movable section being arranged to eject the cast type from the mold after it has been forced out of said cavity.

6. A mold for casting type including a support, a flat plate slidably mounted on said support and provided with a slot and ridge, a stationary mold member arranged above the plate and provided on its bottom with a cavity, the mouth of which is normally closed by said plate, a bar connected to the upper mold member andextending through the slot in the plate for guiding the latter, said upper mold member having a groove into which the ridge extends, means for ejecting a cast type from said cavity when the plate has been slid out of the way to permit the cast type to fall onto said support, the plate functioning to eject the cast type from mold member when the plate moves in one direction.

between the support and upper In testimony whereof I have signed my name to this specification.

NOBUTARO MONOBE, 

